pkg/domain/infra/abi/play.go: fix two nilness issues

The first condition is checking an error where no error is returned and
the second is checking even though err == nil was matched above already
so we know the error is not nil here.

Then also replace os.IsNotExist(err) with errors.Is(err, os.ErrNotExist)
as that should be used for new code.
This should not change behavior in any way.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

Author: Luap99

pkg/domain/infra/abi/play.go

@@ -715,9 +715,6 @@ func (ic *ContainerEngine) playKubePod(ctx context.Context, podName string, podY
 	}
 
 	p := specgen.NewPodSpecGenerator()
-	if err != nil {
-		return nil, nil, err
-	}
 
 	p, err = entities.ToPodSpecGen(*p, &podOpt)
 	if err != nil {
@@ -1632,7 +1629,7 @@ func getBuildFile(imageName string, cwd string) (string, error) {
 	// If the error is not because the file does not exist, take
 	// a mulligan and try Dockerfile.  If that also fails, return that
 	// error
-	if err != nil && !os.IsNotExist(err) {
+	if !errors.Is(err, os.ErrNotExist) {
 		logrus.Error(err.Error())
 	}
 
@@ -1642,7 +1639,7 @@ func getBuildFile(imageName string, cwd string) (string, error) {
 		return dockerfilePath, nil
 	}
 	// Strike two
-	if os.IsNotExist(err) {
+	if errors.Is(err, os.ErrNotExist) {
 		return "", nil
 	}
 	return "", err